Features: 5 Ways to Unlock: Biometric door lock enjoys hassle-free entry with our 5 in 1 unlock method, including Tuya APP, fingerprint, code, key, and IC card access for added convenience and security. With FPC sensor, just needs 0.5 second fast fingerprint recognition, and with a valid password of 6-10 digits and support for front and rear virtual passwords. Tuya APP Mode: Tuya Smart (compatible with iOS version) of smart door knob can be downloaded from the app store, and the compatible with Android version can be download from the application store of compatible with Google play, Aptoide and so on. Open BT on smartphone and click to "Add device", Select lock, and select "Start BT distribution network", and then connect it. It can check the record by cloud record. USB Rechargeable: Thumbprint door knob powered by 4*AAA batteries (not included). When the voltage is below 4.8V, there will be a voice alarm prompt every time the lock is opened (it is expected to open the door about 100 times). There has USB emergency power socket, which can be used to open the door by charging the door with a power bank device through the USB interface when there is no power at all. Multiple Function: Fingerprint door knob with trial and error locking function that after 5 consecutive password verification failures or 30 fingerprint failures, the system locks for 90 seconds and emits an alarm sound. Supporting mobile app to generate remote passwords for customers to input to unlock. Also support mobile app apartment management function. Easy Installation: Firstly, install 4*AAA batteries (not included) in correctly direction in the smart lock , and insert the front handle into the lock body. Secondly, disassemble the rear handle to 2 parts, and install the part A align to square bar and install part B, and then screw connecting screws tightly. Finally, insert and rotate the key 180 degrees in the keyhole after finishing the installation, and the rotate the front handle to test. Specification: Product material: Aluminum alloy Product size: Front handle: 6.8 x 5.5cm / 2.67 x 2.16in Rear handle: 64mm / 2.51in Surface process: Anodizing Fingerprint collection window: Semiconductor biological activity recognition, recognition time less than 0.5 seconds Fingerprint storage capacity: 100 pieces Password storage capacity: 50 sets (valid password length 6-10 bits, supporting up to 16 virtual passwords) IC card storage capacity: 30 pieces Mobile App: Tuya Smart (BT) Unlock method: Fingerprint, password, IC card, BT, key, remote temporary password Fingerprint collection resolution: 500 DPI Rejection rate: (FRR)<0.1% False recognition rate: (FRA)<0.001% Power supply: 4 x AAA Alkaline battery (not included) Emergency power supply: 5V USB socket Battery life: 10 months (lock on/off 10 times per day) or continuously unlock 3000 times Low voltage alarm: When the battery voltage is lower than 4.8V (it can be used for about 100 times), it will prompt for low voltage every time the door is opened Working environment temperature: -25 - 65 ℃ Working environment humidity: 20% RG-90% RH Suitable for door thickness: Standard 35mm-65mm / 1.37 - 2.55in, other sizes require customized accessories Lock body: 6070 bolt Scramble code: 15 digits total Working voltage: 4.8-6.2V Product color: Black, Black Silver (Optional) Description: Add Fingerprint/Temporary Passcode: Click "Member Management", select Member, and then click "Add". Place finger on the recognition area 5 times following the voice prompts. Note: Every time place finger, fine adjust the position of finger to ensure that fingerprint is fully recorded. Select "Temporary Code", and 4 types of passcodes for your choice, "Time Limited", "One-time", "Dynamic" and "Custom". Passage Mode: Close "Auto Lock", and unlock the lock once, Passage Mode is on. Open "Auto Lock" and unlock the lock once, Passage Mode is off. Note: After Passage Mode is on, anyone can unlock the lock without any permission. Reset Lock with App: Click " Remove Device", and click "Confirm" to delete and reset the lock from APP. Note: If the lock is offline, you need to slide your finger on the main interface to make the lock online. Reset Lock with Reset Hole: 1. Take the front handle down, then disassemble it and change the lock by USB interface 2. Press the RET reset hole lightly for 4s with a small object (such as a ballpoint pen), we will hear beep sound every second. Release it when the sound of beeps stops. The system will automatically restore the factory Settings within 5 seconds, and the voice message will indicate that the factory Settings have been restored successfully. Packing List: 1 x Front Handle 1 x Rear Handle 1 x Lock Body 7 x Screws 2 x IC Card 2 x Mechanical Keys 1set x Tools 1 x Packing Box 1 x Manual All loved it , you must satisfied!